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You may share your backyard and even your bed, but it's probably best to avoid sharing a meal with man's best friend, or any other pet for that matter. Listed here, from most (1) to least (8) dangerous, are common foods and drinks that make pets sick. If you think your dog, cat, or bird has consumed one of these items and you are concerned, contact your veterinarian or the ASPCA Animal Poison Control Center (888-426-4435).